Mechnanical diaphragm-signal.



Patented Mar. 7,1916.

llll

, w. GRAMBART. MECHANICAL DIAPHRAGM SIGNAL.

APPLICATION FILED NOV- 13, I914.

WITNESSES wrnnmm enamnnnr, or rsooxnrn NEW Yomzj To alz wh om it may concern I Be it known that I, William-Grammar,

a'citizen of the United States, and a resident *oftheborough of Brooklyn," in the county of Kingsand State of New York, have invent edjc'ertain new and useful Improvements in Mechanical Diaphragm- Signals, of which i l the following is a specification.

\ I a a u I I l Thls invention is an improvement in signals, wherein a diaphragm is vibrated by mechanical means to produce the sound, and

' the object is to provide an exceedingly simple, durable, low cost and at the same time efi'ective' construction.

The invention comprises certain novel and important featuresof construction and rela- Y tlon, which will hereinafter appear and be is a verticallongitudinal section through a horn signal embodying the invention, the

projector being broken away'and parts witha removed and the operating handle in crossin the back case'being shown in elevation; Fig. 2 is a rear elevation, with the back case section; Fig. a is plan View, p r in aim and partly-broken away, showing the operating mechanism-and its tilt'able supporting framegfand Fig. 4 is a detail vertical "section onan enlarged scale showing the fulcrunijoint and indicating the movability of the tilting frame member by dotted lines.

" fThe fixed'fr'amework of the signal condiaphragm clamp ring 2, which with a front sists primarily in thisinstance of a back case member 3 holds the marginal portion of a diaphragm 4.,gaskets 5 being intera posed and the parts. being secured together byscrews 6, as is usual. From an opening in the front case there extends "a suitable horn or projector 7. The diaphragm is pro j vided "centrallyor' in its interior portion with an anvil 8, which is actedupon by a toothed wheel 9 todisplace the diaphragm inthe customary manner. The invention is c and adjustment ofuthis rotary actuator and.

laureate the back diaphragm clamp ring 2,.

particularly concerned with the mounting its operating mechanism. a A frame 10 i provided'be'hmd the d1aphragm; andin'this instance comprises a forward base portion 11, bridging and-seand rearwardly extending laterally-spaced gidef ortious formed integral or other wise united withl h'e front portion. By and L mnonanrcar; DIAPHRAGM-SIGNAL.

I l i specification of Letters Patent. r mm ge Imam s, 1914, Serial m5. 371,850.

Patented Mar. '7, 1916,

, between these side portions, the actuator 9.

and itsdriving gearing are supported, the perlphery of the ratchet-like actuator operating upon the anvil 8 through an opening '13 m theframe front portion. "In the preferred embodlment the actuator is jour:

ruled on asleeveior hollow, shaft 14, which is mdicated by dotted lines in Fig. 3, and bears at opposite ends a pinion l5 and a ratchet 16, the ratchet being coupled with the actuator for one-way movement by means of a pawl 17and a spring '18 mounted on a fly wheel element 19 united with the actuator. The primary driving gear is shown as consisting. of a gear segment, 20, meshing with the pinion 15 and united with a'Irearwardly projecting handle 21. This lever carries an operating knob 50, which is disposed in rear of the back case in position to be depressed by a downwardmovement of the hand. The sleeve or hollowvshaft l lis journaled on a fixed shaft 22 connecting the side portions 12 of the frame, while the segment 20 and handle 21 are pivotally mounted by being secured'to a shaft 23 rotatable in the frame. A spring 24, coiled about the latter shaft and securedatone end thereto and at the opposite endvbearing against a cross-piece 25, serves toreturn the handle to normal position after being depressed. I It will be observed that the pinion 15 and ratchet 16 on the sleeve 14 at ogposite sides ofythe diaphragm actuator a 0rd lateral support to this wheel and space the same from the siddplates 12. Furthermore, the construction facllltates assembling since the sleeve with the actuator, pinion, ratchet and pawl constitute a unit, which 1s placed between the said side plates and then'held in place by the fixed shaft/22. The parts in rear of the diaphragm "are inclosed by a back case 26 having a vertical slot 27 in its rear wall, to permit the passage and operation of the handle 21, and an enlarged for- .loo

wardportion 28 terminating in a flange 29 secured to the diaphragm clamp ring 2.

The adjustment between the diaphragm;

and its actuating mechanism to secure the proper tone is eifected 'b'y tilting" of the frame 10 carrying the actuator 9 and the drive mechanism, the frame'being fulcrumed on a fixed part, namelythe clamp ring 2,-at' one side of the diaphragm center and pro-- vided with an adjuster 30 at the opposite side of said center, the actuator being' sup ported in relation intermediate the fulcrum and adjuster, thearrangement thus being of a movement-reducing character, enabling an especially fine adjustment vto be, secured,

. The fulcrum 'oint between the tiltable frame and the diap rag'm clamp is preferably 10,-.

cated at the top and the adjuster .30 at the abling the adjuster to project outside, "as

" a shmvninFigJI-L {The fulcruinjoint, shown I more particularly in .Fig. 4, comprises a curved lug 32 on theiframe and a-portion 33 on the diaphragm clamp, the two being.- unitedby a screw fastening 34 subs'tantially perpendicular: to the diaphragm and the member 32- of the joint having its convex. bearing ,face presented to the face of the memberl33 so as'to' enable the frame to'rock when acted upon' b'y the adjusten. flhe screw 34: passes loosely through an opemtg.

in the frame lug 32 to engage a thread face 36 of, its head is rounded or convexed for engagement. with the'concave side-ofthe/ iug'32. The adjuster comprises'a studbolt 37, fixeol'to and projecting rearward fro'm nutsZ-Bfi and 4:0 on the bolt at opposite sides Q 7 of the said lug, enabling the frame tobe moved in one direction or the other and held fixed at the desired adjustment.

A; convenient manner of o with the thumb and fingers'and with the 7 purchase thus obtained to press down with L 40 the ball'ofthehand upon the knob 50. This swings the "lever 21 downward and moves the gear segment 20 upward, thereby rotating the pinion 15 in the direction which proq J duces operative'engagement'of the pawl and 'Q I the operating mechanism, producing a succession .of dla" hragm impacts of requisite .number'and equencyi; with only a single gear multiplication. When the press'ureis removedfrom theoperating knob, the spring restores the gear'seginent and handle to normal POSltiQllybllt in this movement the ratchetlti rides idly beneath the pawl 1 7,on

the actuator, which is consequently not driven in this direction." 7 1 signal, the combination with azfii'redframe What is claimed as new is: l

' '1, a mechani'chlly actuated WPPQ g" and clamping the; diaphragm and-carrying a horn and'a'backfcase at bpposite sides thereof, of a] rotary actuator,

and operating means Within .-saidjback case,

'stantially V f and an ad uster for the tiltable frame at'the operating means v ding the signalis for the operator to grasp the back case said; (1 convex un er portion and a-tiltable trainee g' the actuator and. operating means, said tiitable frame having a portion at one side of the actuator .fulcrumed on the rear face'of} saidfixed frame and connected thereto by a pinisubperpendicular to the diaphragm,

oppositeside of'the actuator .2. In amcchanieally actuateddiaphragm signal, the combination with a fixed frame supporting and clamping the diaphragm and carrying a horn and a hack case at opposite sides thereof, of a rotai'jfiactuator and operating means within said back case, and-a tiltab1e fia1i e harmingthe actuator and operating'igmeans. saidtiltajble frame comprising an' "opens-oar portion throughwhich the periphery. OfthQ-Miifltfll pro;

ontporti'onlying adjacent je cts, the-said P p the dia hragm fulcmrned at one side 0 the onthe .rearface of the fixed frame by meansof a pinsnhstantially opening-in the part 33, and' the under sur perpendicularto the diaphragm" and havingfan adjusting device 'at'thefopposite side of fthe-center, said frame minimising also. parallel side portions projsazting rearward from the forward the lower portion of thejback diaphragm clamp and passing loosely through an a r-; ture in an offset lug 38-on the" bottom 0 the frameportiOn .11, and in addition theretoortion, the actuatorand between said side port1ons,-

' 3. Ina signal, adiaphragm, frame, I

Pr wl y" a a name, tiltable toward and from the an,

phragm and carrying for the same, "said tiltable mmehmg'a fulcrumingface bearingon said fixe frame formed with a convex face, and a fastening substantially perpendicular to'the diaphragm the tiltable p and frames at said bearing; p

xlna' signal, thdccmbination of a dia phragm, a fixed part behind the diaphragm,

a frame having a curved apertuned', bearing IQQ portion viith its convex "face. opposed to said 7 fixed part, a-screw passing looselyjthrough the a erturein, saidbearing portioninto. art and having ahead with a side ofithe bearing portion, an adjusting deiice-connected mth the frame, :and means engaging the-concave towardand from] the diaphragm, mecha nism mounted on said tiltable frame forj' ac tuatmg the diaphragm, a backcase' inclos-f mg said tiltableframe and mechanism and having a' flai'ingbase by which it is united to thefixed frame, said flaring base having arecess; therein, and an adjuster. for said tiltable, frame projecting through said ,re-

7 cessin the fiaring base offthlback "case.

- 6.;A niechanically diaphragm.

horn, comprising i, a p; diaphragm and diap r m ase a ai cter at n in'a forward therefrom and. a rearwardlj ex nding back 7 case, combination iv'ith mechanism in said back ease comprising a rotary toothed aetuator, and multiplying gearing for drivg, said' actuator xinclud1ng a, large gear isegment and" a one-way acting connection rfibettveen the sameand the actuator, an operating lever united with said segment and extending rearward from the back case, and

mend, the fingers-resting on the case.

p 7. A (mechanically actuated diaphragm Ljhorn, comprising a diaphragm and diaphragm case, aprojector extending forward therefrom and a rearwardly extending back case, in combination with mechanism in said =,back ease comprising-a rotary toothed actuatonand multiplying gearing for driving *yhlsaid actuator including a large ,gear seg-' lament and a one-halfway actmgconnection Ybetween the same hand the actuator, an operating lever united with said seg-Y Qinent and extending rearward from the. back caserand aknob on said. lever close to the l e filcopief'ot thisflpa tent may be obtaineafor rear wall of the case between the projections of the side lines thereof and substantially at the same height as the top of the case, whereby the lever may be operated by downward pressure applied by the ball of the hand, the fingers resting on thecase.

8. In a mechanically actuated diaphragm signal, the combination with a plane fixed frame supporting and clamping the diaphragm and carrying a horn and a back case at opposite sides thereof, of a tiltable the back case,'said tiltable frame being fulcrumed at one end directly on the rear face frame mounted on the fixed frame within oftthe fixed frame and having an adjustable connection with the fixed frame at its opposite end, a rotary actuator journaled in.

the frame intermediate the fulcrum and adjustable connection, and means for actuating said actuator, a. shaft on the tiltable frame in rear of said actuator, a driver on said shaft geared to the actuator, and a handle for operatin said driver.

I Witnesses:

, J. FLBBANDENBC'HG,

W. L. GARRETSON.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0."

VVIL 1AM GRALIBART. 

